hornwort(redirected from Anthocerotopsida)
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1. Any of several small green nonvascular plants of the division Anthocerotophyta, having a flat thallus from which elongated, hornlike spore-producing structures grow.
2. Any of several aquatic vascular plants of the genus Ceratophyllum, forming branched masses in quiet water and having minute unisexual flowers and stiff, forked, whorled leaves resembling antlers or horns.
1. (Plants) any aquatic plant of the genus Ceratophyllum, forming submerged branching masses in ponds and slow-flowing streams: family Ceratophyllaceae
2. (Botany) any of a group of bryophytes belonging to the phylum Anthocerophyta, resembling liverworts but with hornlike sporophytes
any of several rootless aquatic herbs of the genus Ceratophyllum, having finely dissected, whorled leaves.
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|Noun||1.||hornwort - any aquatic plant of the genus Ceratophyllum; forms submerged masses in ponds and slow-flowing streams|
|2.||hornwort - liverworts with slender hornlike capsules|
Anthocerotales, order Anthocerotales - hornworts; liverworts having a thalloid gametophyte; in some classification systems included in the class Hepaticopsida